import 'package:flutter/material.dart';

import 'package:english_words/english_words.dart';

void main() => runApp(const MyApp());

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Welcome to Flutter',
      theme: ThemeData(
        primaryColor: Colors.amber,
      ),
      home:
      RandomWords(), /*Scaffold(
        appBar: AppBar(
          title: const Text('Welcome to Flutter'),
        ),
        body: const Center(
          child: RandomWords(),
        ),
      ),*/
    );
  }
}

class RandomWords extends StatefulWidget {
  const RandomWords({Key? key}) : super(key: key);

  @override
  createState() => RandomWordsState();
}

class RandomWordsState extends State<RandomWords> {
  final _suggestions = <WordPair>[];

  final _biggerFont = const TextStyle(fontSize: 18.0);

  final _saved = Set<WordPair>();

  Widget _buildSuggetions() {
    return ListView.builder(
        padding: const EdgeInsets.all(16.0),
        itemBuilder: (context, i) {
          if (i.isOdd) return Divider();
          final index = i ~/ 2;
          if (index >= _suggestions.length) {
            _suggestions.addAll(generateWordPairs().take(10));
          }
          return _buildRow(_suggestions[index]);
        });
  }

  Widget _buildRow(WordPair pair) {
    final alreadySaved = _saved.contains(pair);
    return ListTile(
      title: Text(
        pair.asPascalCase,
        style: _biggerFont,
      ),
      trailing: Icon(
        alreadySaved ? Icons.favorite : Icons.favorite_border,
        color: alreadySaved ? Colors.red : null,
      ),
      onTap: () {
        setState(() {
          if (alreadySaved) {
            _saved.remove(pair);
          } else {
            _saved.add(pair);
          }
        });
      },
    );
  }

  void _pushSaved() {
    Navigator.of(context).push(MaterialPageRoute(builder: (context) {
      final tiles = _saved.map((pair) {
        return ListTile(
          title: Text(
            pair.asPascalCase,
            style: _biggerFont,
          ),
        );
      });
      final divided =
      ListTile.divideTiles(context: context, tiles: tiles).toList();

      return Scaffold(appBar: AppBar(title: Text('save Suggestions'),),
        body: ListView(children: divided,),);
    }));
  }

  @override
  Widget build(BuildContext context) {
    //final wordPair = WordPair.random();
    //return Text(wordPair.asPascalCase);
    return Scaffold(
      appBar: AppBar(
        title: Text('startup test'),
        actions: <Widget>[
          IconButton(
            icon: Icon(Icons.list),
            onPressed: _pushSaved,
          )
        ],
      ),
      body: _buildSuggetions(),
    );
  }
}
